So I had intercourse with my partner 1 day before my ovulation. I somehow felt I was pregnant .

I was 6 days late and today at the cinema hall I started cramping real bad and blood oozed out like pee. Usually when we get period on the 1 at day it isn’t so abrupt and excess. Later in the evening still cramping real bad along with lower back pain. So did I have a miscarriage ??